sip_invite_state.hxx.~3~

模拟移动客户端软件飞信登录的状态机器定义代码。

//====================================================================
//                
// Copyright (C) 2006-2007,  Frank.Ning
//                
// Filename:      sip_invite_state.hxx
// Author:        Frank.Ning <[e-mail]>
// Description:   
//                
// $Id:$
//                
//====================================================================
#ifndef __SIP_INVITE_STATE_HXX__
#define __SIP_INVITE_STATE_HXX__

#include "state.hxx"

static const char* const sip_invite_state_hxx_version =
   "$Id:$";

struct sip_invite_state : public fsm::state<sip_invite_state, FetionInviteStateList, bool>
{
      bool on_process( shared_ptr<event> evt )
      {
         shared_ptr<sip_event> sip_evt;

         sip_evt.reset( evt );

         if( !sip_evt )
            return false ;

         shared_ptr<sip_msg> msg;
         
         msg.reset( sip_evt->get_msg( ) );
         
         if( !msg )
            return true ;

         shared_ptr<sip_cmd> cmd;
         cmd.reset( msg );

         if( cmd )
            return on_process( cmd );

         shared_ptr<sip_status> status ;

         status.reset( msg );

         if( status )
            return on_process( status );

         return false ;
      }

      bool on_process( shared_ptr<sip_cmd> cmd )
      {
         ua_callctl& ua = ua_callctl::instance( );

         shared_ptr<sip_callid> callid;
         callid.reset( cmd->get_hdr( HDR_CALLID ) );

         shared_ptr<ua_agent> agent = ua.find_agent( callid->get_callid( ) );

         if( !agent )
            return false ;

         agent->set_last_sip_cmd_msg( cmd );
         
         // check there is CANCEL command
         if( cmd->get_method( ) == "C" ||
             cmd->get_method( ) == "CANCEL" )
         {
            agent->stop( );
            return true ;
         }

         if( agent->uas( ) )
         {
            shared_ptr<sip_status> trying_msg = agent->build_trying_msg( cmd );

            // Ack to Proxy server
            ua.get_output_channel( )->add( shared_ptr<sip_event>( trying_msg ) );

            agent->set_last_sip_status_msg( trying_msg );
            
            // Ack to peer agent
            shared_ptr<sip_status> ring_msg = agent->build_ring_msg( cmd );
            ua.get_input_channel( )->add( shared_ptr<sip_event>( ring_msg ) ); // Send from ring state            
         }
         else
         {
            // UAC cmd is INVITE msg, send to
            ua.get_output_channel( )->add( shared_ptr<sip_event>( cmd ) );
         }
         
         switch_to<sip_ring_state>( );

         return true ;
      }

      bool on_process( shared_ptr<sip_status> status )
      {
#if 0
         ua_callctl& ua = ua_callctl::instance( );
         
         shared_ptr<sip_callid> callid;
         callid.reset( cmd->get_hdr( HDR_CALLID ) );

         shared_ptr<ua_agent> agent = ua.find_agent( callid->get_callid( ) );

         if( !agent )
            return false ;
            

         if( agent->uac( ) )
            swicth_to<sip_ring_state>( );
#endif
         // there is not need to process 
         return true ;
      }

};

#endif